Don Marquis has put forward a non-religious argument against abortion based on what he claims is a morally relevant similarity between killing adult human beings and killing fetuses. He asserts that killing adults is wrong because it deprives them of their valuable futures. He points out that a fetus’s future includes everything that is in an adult’s future, given that fetuses naturally develop into adults. Thus, according to Marquis, killing a fetus deprives it of the same sort of valuable future (...) that an adult is deprived of in being killed and this makes abortion seriously wrong. Commentators have raised a number of objections to Marquis’s argument, to which he has satisfactorily responded. In this paper, difficulties with Marquis’s argument that have not been considered by previous commentators are pointed out. A main thesis of this paper is that Marquis does not adequately defend his argument against several important objections that he himself has raised. These new considerations support the view that Marquis’s argument is unsuccessful. (shrink)

Could it be that if a fetus is not a person abortion is still immoral? One affirmative answer comes in the form of ‘The Impairment Argument’, which utilizes ‘The Impairment Principle’ to argue that abortion is immoral even if fetuses lack personhood. I argue ‘The Impairment Argument’ fails. It is not adequately defended from objections, and abortion is, in fact, a counterexample to the impairment principle. Furthermore, it explains neither what the wrong-making features of abortion are nor what features of (...) fetuses ground their supposed moral significance. By presupposing the fetus lacks personhood and providing no alternate account of the basis of fetuses’ moral significance, there is nothing to constitute abortion’s wrongness. Attempts to modify it fail for the same reasons. Thus, the impairment argument fails to show abortion is immoral. (shrink)

This paper examines whether there are moral differences between the mitochondrial replacement techniques that have been recently developed in order to help women afflicted by mitochondrial DNA diseases to have genetically related children absent such conditions: maternal spindle transfer and pronuclear transfer. Firstly, it examines whether there is a moral difference between MST and PNT in terms of the divide between somatic interventions and germline interventions. Secondly, it considers whether PNT and MST are morally distinct under a therapy/creation optic. Finally, (...) it investigates whether there is a moral difference between MST and PNT from a human embryo destruction point of view. I conclude, contra recent arguments, that regarding the first two points there is no moral differences between PNT and MST; and that regarding the third one MST is morally preferable to PNT, but only if we hold a gradualist account of the moral value of human embryos where zygotes have slight moral value. (shrink)

It is natural for those with permissive attitudes toward abortion to suppose that, if they have examined all of the arguments they know against abortion and have concluded that they fail, their moral deliberations are at an end. Surprisingly, this is not the case, as I argue. This is because the mere risk that one of those arguments succeeds can generate a moral reason that counts against the act. If this is so, then liberals may be mistaken about the morality (...) of abortion. However, conservatives who claim that considerations of risk rule out abortion in general are mistaken as well. Instead, risk-based considerations generate an important but not necessarily decisive reason to avoid abortion. The more general issue that emerges is how to accommodate fallibilism about practical judgment in our decision-making. (shrink)

I discuss the propositional knowledge of an omniscient being, knowledge of facts that can be represented by that-clauses in sentences such as ‘John knows that the world is round.’ I shall focus upon questions about a supposedly omniscient being who propositionally knows the truth about all current states of affairs. I shall argue that there is no such being.